Unpleasant smelling carbylamines are formed by heating alkali and chloroform with

Aniline does not undergo

The product $(A)$ is:

$Ph-C(=O)-OH$ $\xrightarrow{NH_3, \Delta} (A)$ $\xrightarrow{Br_2, KOH} (B)$,product $(B)$ is:

The final product $(IV)$ obtained in the reaction sequence
Toluene $\xrightarrow[{2. \ H^{+}}]{{1. \ KMnO_4/OH^{-}}} I$ $\xrightarrow{{SOCl_2}} II$ $\xrightarrow{{NH_3}} III$ $\xrightarrow{{OBr^{-}}} IV$ is

Which of the following produces nitrogen gas after the reaction with nitrous acid?